Stormwater Information

Regarding Seasonal Storms and Related Flooding

Frequent Asked Questions (FAQ) Published May 19, 2020

The Chicago region continues to receive record setting rainfall. In 2019, the wettest May on record impacted the area with 8.25 inches of rainfall. This record was broken as of May 19th 2020, with a new record of 8.3 inches for the month of May, with 12 days remaining. Regional and nation-wide trends continue to track increased rainfall amounts, with the United States recording its second-wettest year on record in 2019. Additionally, since precipitation records began in 1871, four of the top five wettest years in Chicago have occurred in the last decade (Chicago Tribune, May 19, 2020).